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A196635
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Number of nX7 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 1,3,2,0,4 for x=0,1,2,3,4
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1
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1, 161, 2716, 61040, 1339251, 29718190, 651323279, 14313363492, 314536084653, 6918341058099, 152091254605720, 3343887108564234, 73523096683740016, 1616580075894214591, 35544361135805663463, 781529666441604010638
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OFFSET
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1,2
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COMMENTS
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Every 0 is next to 0 1's, every 1 is next to 1 3's, every 2 is next to 2 2's, every 3 is next to 3 0's, every 4 is next to 4 4's
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LINKS
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EXAMPLE
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Some solutions for n=4
..0..0..3..0..0..3..0....0..3..0..0..2..2..2....0..3..0..2..2..2..2
..0..0..0..0..0..0..0....0..0..0..0..2..0..2....0..0..0..2..0..0..2
..0..0..0..3..3..0..3....3..0..0..0..2..2..2....3..0..0..2..2..0..2
..0..0..3..0..0..3..0....0..3..0..3..0..0..0....0..0..3..0..2..2..2
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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